Patent US3120934A successfully refreshed from Google Patents.
US3120934A
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Aircraft automatic landing system
Assignee: Unisys Corp
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Filing: 1963-01-09
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Granted: 1964-02-11
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Expires: 1983-01-09
Abstract
No abstract record available.
Inventors
- 👤 Alan J Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:18
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
AN AIRCRAFT AUTOMATIC LANDING SYSTEM FOR GUIDING AN AIRCRAFT TO A LANDING ALONG A RADIO DEFINED COURSE COMPRISING, (A) RADIO RECEIVING MEANS FOR PROVIDING A FIRST CONTROL SIGNAL IN RESPONSE TO THE LATERAL DISPLACEMENT OF THE AIRCRAFT FROM SAID COURSE, (B) MEANS FOR PROVIDING A SECOND CONTROL SIGNAL REPRESENTATIVE OF THE LATERAL RATE OF DISPLACEMENT OF THE AIRCRAFT FROM SAID COURSE, (C) MEANS FOR PROVIDING A THIRD CONTROL SIGNAL REPRESENTATIVE OF THE HEADING OF THE AIRCRAFT WITH RESPECT TO THE HEADING OF A PREDETERMINED RUNWAY, (D) INTEGRATING MEANS RESPONSIVE TO SAID FIRST CONTROL SIGNAL FOR PROVIDING A FOURTH CONTROL SIGNAL REPRESENTATIVE OF THE INTEGRAL THEREOF, (E) ROLL SERVO MEANS RESPONSIVE TO SAID FIRST, SECOND, THIRD AND FOURTH CONTROL SIGNALS FOR CONTROLLING THE AIRCRAFT IN ROLL IN ACCORDANCE THEREWITH, (F) YAW SERVO MEANS FOR CONTROLLING THE AIRCRAFT IN YAW, AND (G) SWITCH MEAN FOR SELECTIVELY CONNECTING SAID YAW SERVO MEANS IN ONE CONDITION TO BE RESPONSIVE TO SAID THIRD CONTROL SIGNAL AT A PREDETERMINED DECRAB ALTITUDE.
Claim 2
Dependent Claim
165 words
AN AIRCRAFT AUTOMATIC LANDING SYSTEM FOR GUIDING AN AIRCRAFT TO A LANDING ALONG A RADIO DEFINED COURSE COMPRISING, (A) RADIO RECEIVING MEANS FOR PROVIDING A FIRST CONTROL SIGNAL IN RESPONSE TO THE LATERAL DISPLACEMENT OF THE AIRCRAFT FROM SAID COURSE, (B) MEANS FOR PROVIDING A SECOND CONTROL SIGNAL REPRESENTATIVE OF THE LATERAL RATE OF DISPLACEMENT OF THE AIRCRAFT FROM SAID COURSE, (C) MEANS FOR PROVIDING A THIRD CONTROL SIGNAL REPRESENTATIVE OF THE HEADING OF THE AIRCRAFT WITH RESPECT TO THE HEADING OF A PREDETERMINED RUNWAY, (D) INTEGRATING MEANS RESPONSIVE TO SAID FIRST CONTROL SIGNAL FOR PROVIDING A FOURTH CONTROL SIGNAL REPRESENTATIVE OF THE INTEGRAL THEREOF, (E) ROLL SERVO MEANS RESPONSIVE TO SAID FIRST, SECOND, THIRD AND FOURTH CONTROL SIGNALS FOR CONTROLLING THE AIRCRAFT IN ROLL IN ACCORDANCE THEREWITH, (F) YAW SERVO MEANS FOR CONTROLLING THE AIRCRAFT IN YAW, AND (G) SWITCH MEAN FOR SELECTIVELY CONNECTING SAID YAW SERVO MEANS IN ONE CONDITION TO BE RESPONSIVE TO SAID THIRD CONTROL SIGNAL AT A PREDETERMINED DECRAB ALTITUDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |